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-rw-r--r--src/mesa/main/bufferobj.c185
1 files changed, 121 insertions, 64 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index ebca798635..b95e00af5b 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -314,9 +314,10 @@ _mesa_initialize_buffer_object( struct gl_buffer_object *obj,
* \param usage Hints about how the data will be used.
* \param bufObj Object to be used.
*
+ * \return GL_TRUE for success, GL_FALSE for failure
* \sa glBufferDataARB, dd_function_table::BufferData.
*/
-static void
+static GLboolean
_mesa_buffer_data( GLcontext *ctx, GLenum target, GLsizeiptrARB size,
const GLvoid * data, GLenum usage,
struct gl_buffer_object * bufObj )
@@ -334,6 +335,11 @@ _mesa_buffer_data( GLcontext *ctx, GLenum target, GLsizeiptrARB size,
if (data) {
_mesa_memcpy( bufObj->Data, data, size );
}
+
+ return GL_TRUE;
+ }
+ else {
+ return GL_FALSE;
}
}
@@ -652,6 +658,8 @@ _mesa_update_default_objects_buffer_objects(GLcontext *ctx)
* currently mapped. Whoever calls this function should check for that.
* Remember, we can't use a PBO when it's mapped!
*
+ * If we're not using a PBO, this is a no-op.
+ *
* \param width width of image to read/write
* \param height height of image to read/write
* \param depth depth of image to read/write
@@ -670,7 +678,8 @@ _mesa_validate_pbo_access(GLuint dimensions,
GLvoid *start, *end;
const GLubyte *sizeAddr; /* buffer size, cast to a pointer */
- ASSERT(_mesa_is_bufferobj(pack->BufferObj));
+ if (!_mesa_is_bufferobj(pack->BufferObj))
+ return GL_TRUE; /* no PBO, OK */
if (pack->BufferObj->Size == 0)
/* no buffer! */
@@ -702,17 +711,18 @@ _mesa_validate_pbo_access(GLuint dimensions,
/**
- * If the source of glBitmap data is a PBO, check that we won't read out
- * of buffer bounds, then map the buffer.
- * If not sourcing from a PBO, just return the bitmap pointer.
- * This is a helper function for (some) drivers.
- * Return NULL if error.
- * If non-null return, must call _mesa_unmap_bitmap_pbo() when done.
+ * For commands that read from a PBO (glDrawPixels, glTexImage,
+ * glPolygonStipple, etc), if we're reading from a PBO, map it read-only
+ * and return the pointer into the PBO. If we're not reading from a
+ * PBO, return \p src as-is.
+ * If non-null return, must call _mesa_unmap_pbo_source() when done.
+ *
+ * \return NULL if error, else pointer to start of data
*/
-const GLubyte *
-_mesa_map_bitmap_pbo(GLcontext *ctx,
+const GLvoid *
+_mesa_map_pbo_source(GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack,
- const GLubyte *bitmap)
+ const GLvoid *src)
{
const GLubyte *buf;
@@ -724,11 +734,11 @@ _mesa_map_bitmap_pbo(GLcontext *ctx,
if (!buf)
return NULL;
- buf = ADD_POINTERS(buf, bitmap);
+ buf = ADD_POINTERS(buf, src);
}
else {
/* unpack from normal memory */
- buf = bitmap;
+ buf = src;
}
return buf;
@@ -736,56 +746,54 @@ _mesa_map_bitmap_pbo(GLcontext *ctx,
/**
- * Counterpart to _mesa_map_bitmap_pbo()
- * This is a helper function for (some) drivers.
- */
-void
-_mesa_unmap_bitmap_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *unpack)
-{
- if (_mesa_is_bufferobj(unpack->BufferObj)) {
- ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
- unpack->BufferObj);
- }
-}
-
-
-/**
- * \sa _mesa_map_bitmap_pbo
+ * Combine PBO-read validation and mapping.
+ * If any GL errors are detected, they'll be recorded and NULL returned.
+ * \sa _mesa_validate_pbo_access
+ * \sa _mesa_map_pbo_source
+ * A call to this function should have a matching call to
+ * _mesa_unmap_pbo_source().
*/
const GLvoid *
-_mesa_map_drawpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *unpack,
- const GLvoid *pixels)
+_mesa_map_validate_pbo_source(GLcontext *ctx,
+ GLuint dimensions,
+ const struct gl_pixelstore_attrib *unpack,
+ GLsizei width, GLsizei height, GLsizei depth,
+ GLenum format, GLenum type, const GLvoid *ptr,
+ const char *where)
{
- const GLvoid *buf;
+ ASSERT(dimensions == 1 || dimensions == 2 || dimensions == 3);
- if (_mesa_is_bufferobj(unpack->BufferObj)) {
- /* unpack from PBO */
- buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
- GL_READ_ONLY_ARB,
- unpack->BufferObj);
- if (!buf)
- return NULL;
+ if (!_mesa_is_bufferobj(unpack->BufferObj)) {
+ /* non-PBO access: no validation to be done */
+ return ptr;
+ }
- buf = ADD_POINTERS(buf, pixels);
+ if (!_mesa_validate_pbo_access(dimensions, unpack,
+ width, height, depth, format, type, ptr)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(out of bounds PBO access)", where);
+ return NULL;
}
- else {
- /* unpack from normal memory */
- buf = pixels;
+
+ if (_mesa_bufferobj_mapped(unpack->BufferObj)) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", where);
+ return NULL;
}
- return buf;
+ ptr = _mesa_map_pbo_source(ctx, unpack, ptr);
+ return ptr;
}
/**
- * \sa _mesa_unmap_bitmap_pbo
+ * Counterpart to _mesa_map_pbo_source()
*/
void
-_mesa_unmap_drawpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *unpack)
+_mesa_unmap_pbo_source(GLcontext *ctx,
+ const struct gl_pixelstore_attrib *unpack)
{
+ ASSERT(unpack != &ctx->Pack); /* catch pack/unpack mismatch */
if (_mesa_is_bufferobj(unpack->BufferObj)) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
unpack->BufferObj);
@@ -794,14 +802,17 @@ _mesa_unmap_drawpix_pbo(GLcontext *ctx,
/**
- * If PBO is bound, map the buffer, return dest pointer in mapped buffer.
- * Call _mesa_unmap_readpix_pbo() when finished
- * \return NULL if error
+ * For commands that write to a PBO (glReadPixels, glGetColorTable, etc),
+ * if we're writing to a PBO, map it write-only and return the pointer
+ * into the PBO. If we're not writing to a PBO, return \p dst as-is.
+ * If non-null return, must call _mesa_unmap_pbo_dest() when done.
+ *
+ * \return NULL if error, else pointer to start of data
*/
void *
-_mesa_map_readpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *pack,
- GLvoid *dest)
+_mesa_map_pbo_dest(GLcontext *ctx,
+ const struct gl_pixelstore_attrib *pack,
+ GLvoid *dest)
{
void *buf;
@@ -825,12 +836,54 @@ _mesa_map_readpix_pbo(GLcontext *ctx,
/**
- * Counterpart to _mesa_map_readpix_pbo()
+ * Combine PBO-write validation and mapping.
+ * If any GL errors are detected, they'll be recorded and NULL returned.
+ * \sa _mesa_validate_pbo_access
+ * \sa _mesa_map_pbo_dest
+ * A call to this function should have a matching call to
+ * _mesa_unmap_pbo_dest().
+ */
+GLvoid *
+_mesa_map_validate_pbo_dest(GLcontext *ctx,
+ GLuint dimensions,
+ const struct gl_pixelstore_attrib *unpack,
+ GLsizei width, GLsizei height, GLsizei depth,
+ GLenum format, GLenum type, GLvoid *ptr,
+ const char *where)
+{
+ ASSERT(dimensions == 1 || dimensions == 2 || dimensions == 3);
+
+ if (!_mesa_is_bufferobj(unpack->BufferObj)) {
+ /* non-PBO access: no validation to be done */
+ return ptr;
+ }
+
+ if (!_mesa_validate_pbo_access(dimensions, unpack,
+ width, height, depth, format, type, ptr)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(out of bounds PBO access)", where);
+ return NULL;
+ }
+
+ if (_mesa_bufferobj_mapped(unpack->BufferObj)) {
+ /* buffer is already mapped - that's an error */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", where);
+ return NULL;
+ }
+
+ ptr = _mesa_map_pbo_dest(ctx, unpack, ptr);
+ return ptr;
+}
+
+
+/**
+ * Counterpart to _mesa_map_pbo_dest()
*/
void
-_mesa_unmap_readpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *pack)
+_mesa_unmap_pbo_dest(GLcontext *ctx,
+ const struct gl_pixelstore_attrib *pack)
{
+ ASSERT(pack != &ctx->Unpack); /* catch pack/unpack mismatch */
if (_mesa_is_bufferobj(pack->BufferObj)) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, pack->BufferObj);
}
@@ -1107,8 +1160,6 @@ _mesa_BufferDataARB(GLenum target, GLsizeiptrARB size,
FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
- ASSERT(ctx->Driver.BufferData);
-
bufObj->Written = GL_TRUE;
#ifdef VBO_DEBUG
@@ -1119,8 +1170,11 @@ _mesa_BufferDataARB(GLenum target, GLsizeiptrARB size,
#ifdef BOUNDS_CHECK
size += 100;
#endif
- /* Give the buffer object to the driver! <data> may be null! */
- ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj );
+
+ ASSERT(ctx->Driver.BufferData);
+ if (!ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj )) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB(access)");
+ }
}
@@ -1209,9 +1263,9 @@ _mesa_MapBufferARB(GLenum target, GLenum access)
map = ctx->Driver.MapBuffer( ctx, target, access, bufObj );
if (!map) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(access)");
+ return NULL;
}
-
- if (map) {
+ else {
/* The driver callback should have set these fields.
* This is important because other modules (like VBO) might call
* the driver function directly.
@@ -1538,7 +1592,10 @@ _mesa_MapBufferRange(GLenum target, GLintptr offset, GLsizeiptr length,
ASSERT(ctx->Driver.MapBufferRange);
map = ctx->Driver.MapBufferRange(ctx, target, offset, length,
access, bufObj);
- if (map) {
+ if (!map) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(access)");
+ }
+ else {
/* The driver callback should have set all these fields.
* This is important because other modules (like VBO) might call
* the driver function directly.
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-11 15:02:28 +0000